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Other Intangible Assets - Additional Information (Detail)
Mar. 31, 2019
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2020 $ 435,000
2021 435,000
2022 435,000
2023 425,000
2024 423,000
Thereafter $ 822,000